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Nephr odium noveboracense Desv. New York fern. This 

 species was reported from West Union, Fayette county, by 

 Mary E. Carr in Linnaean Fern Bulletin, vol. I, No. 3, p. 6. 

 No other Iowa collector mentions the species. The range as 

 given by Britton and Brown in their " Illustrated Flora " is 

 Minnesota to Arkansas, thence eastward. The species prob- 

 ably occurs in northeastern Iowa, from whence it was reported. 



Nephrodium spinulosum Desv. Wood fern. Rare. Musca- 

 tine county, Ferdinand Reppert; Dubuque and Johnson coun- 

 ties, Prof. Shimek; Hardin county, Prof. Pammel; Lee county, 

 Prof. Arthur. 



Nephrodium eristatum Michx. Crested fern. Rich woods, 

 rare. Our specimens are from Muscatine county. Prof. Shimek 

 found the species in Dubuque county. 



Nephrodium marginalc Michx. Marginal shield fern. Our 

 specimens are from Allamakee county, collected by Ellison Orr, 

 who writes: "Growing on a timbered, shady, steep north slope 

 of a sandstone bluff capped by limestone, about seven miles 

 northeast of Postville on Yellow river." The species is also 

 common in a restricted locality near Steamboat Rock, in central 

 Iowa. 



Nephrodium goldieanum Hook. Goldie's fern. Woods, 

 rather infrequent, Winneshiek, Allamakee, Jackson, Hardin, and 

 Muscatine counties. 



Polystiehum acrostichoides Schott. Christmas fern. Rich 

 woods, infrequent or rare in Muscatine and Johnson counties. 

 Reported from Jackson, Fayette, Scott, and Lee counties. 



Cystopteris bulbifera Bernh. Bulbiferous bladder fern. Fre- 

 quent in calcareous soil near cliffs throughout the eastern half 

 of Iowa. 



Cystopteris fragilis Bernh. Brittle bladder fern. Common 

 in all the woodland regions throughout Iowa. 



Onoelea sensibilis L. Sensitive fern. Moist soil, woods and 

 fields, frequent throughout the eastern half of Iowa. 



Struthiopteris Germaniea Willd. Ostrich fern. Rich woods, 

 common in eastern Iowa, infrequent in the central and western 

 portions. 



